 Product Pages:
B5S16861
B5S16862
Today more systems are being designed with basic functionality integrated
as much as possible and with separate modules being used to add feature
functions. Modular components may require hot swapping and some may require
voltage translation. A new set of logic devices are required to isolate
and translate. Normally additional logic in the signal path would add
delay and require more power due to the drive capability of the standard
logic devices. To solve this problem zero-delay logic, or bus switches
can be used. These new bus switch devices are designed specifically for
applications that do not need drive, yet require simple logic functions,
such as bus isolation and/or voltage translation. These devices do not
add signal delay or power.
 Bus
Switches consist of simple n-channel MOS transistors. When the switch
is open, it provides circuit isolation (high-impedance). When the switch
is closed, it provides a near-zero propagation delay through a very small
resistance.
When the 
pin is low, the associated bus switch is on and Port A is connected to
Port B; it acts as a low-impedance (typically<5 Ohm) resistor that
can also translate the input to a lower output voltage.
When
is high, the switch is open, and a high-impedance state exists between
the two ports and the related power consumption is negligible.
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Near-zero propagation delay (250ps typical)
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Low “ON” resistance and input capacitance
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TTL - compatible input and output levels
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Industry standard pinouts
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Used in multiple applications, including:
- Communication (servers/set-top boxes)
- Computing applications (notebooks/servers) |
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